Forest trees of the Pacific slope . field knowledge, Sitka alder, a uniciuely distinct species stilllittle known to lay jieople. has remained in comparative obscurity from 1832until recently. Its habitat and range are yet imperfectly known. Its field nameis alder, and it is ])roba]ily not distinguished by laymen from other aldersof its range. r\ ^07 Fig. 119.—Alnus .sitchcnsis. A slender shrub from 4 to G feet high (in large thickets) or occasionally a treefrom 20 to 30 feet high and from 4 to 8 inches through. Usually crowded inshady places, its crown of nearly straiglit. hoiMzontal branches
Forest trees of the Pacific slope . field knowledge, Sitka alder, a uniciuely distinct species stilllittle known to lay jieople. has remained in comparative obscurity from 1832until recently. Its habitat and range are yet imperfectly known. Its field nameis alder, and it is ])roba]ily not distinguished by laymen from other aldersof its range. r\ ^07 Fig. 119.—Alnus .sitchcnsis. A slender shrub from 4 to G feet high (in large thickets) or occasionally a treefrom 20 to 30 feet high and from 4 to 8 inches through. Usually crowded inshady places, its crown of nearly straiglit. hoiMzontal branches is narrow andopen. The trunk bark is smooth, thin, and dull gray, with a bluish tinge. FOEEST TEEES OF THE PACIFIC SLOPE. 271 Seasons twigs, minutely hairy when young and thickly glandular-dotted, areclear, shiny, yellowish brown, and marked with rather large light-colored leaves (figs. 119, 120)—when young notably sticky, with numerousglandular specks—thin and papery, smooth, yellowish green on their top sides;. I Fig. ll-O.—Alnus sitchcnsis: a, seed, natural size aiul enlarged. much lighter yellow-green and shiny beneath, somewhat as if thinly varnished,or sometimes minutely brown-hairy on the midveins and in the corners of theside veins. Male flower clusters about 3 to 5 inches long and one-thh-d of aninch thick. Mature cones (fig. 120), from five-eighths to three-fourths of an 272 FOKEST TREES OF THE PACIFIC SLOPE. inch long and about tbreo-eigbttis to seven-sixteentbs of an incb tbrousb, bavescales witb blunt tbick ends and minute gauze-winged seeds (fig. TJO, a). Thethin seed-wing is a very distinctive cbai*acter. Wood: Nothing is known of the characteristics of the wood, which is prob-ably very much like that of the mountain alder {Alnus tenuifolia) ; not knownto have any economic use, but, when large enough, suitable for charcoal andfuel. The tree is useful as a forest cover for its firm thickets, which protectlower mountain stream and springy slop
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforestsandforestry
